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How to Darken A Light PDF Document

Jane Zhou updated on Jun 25, 2021 to PDF Editor Tutorials

The PDF format is typically used to create and distribute read-only documents that preserve the layout of a page. They are meant to be non-editable. However, more often than not, you come across situations when you scan a document, and it comes out very light, almost unreadable. Or, you may come across important PDFs such as a contract with text and images that are too faint to be cognized. In these situations, you need a way to darken the PDF documents to make them readable.

This post teaches exactly how to darken a PDF on Windows or Mac. We will discuss the use of three specialized PDF editing tools to achieve that. 

How to Darken A PDF File with EaseUS PDF Editor on Windows

If you use a Windows PC, EaseUS PDF Editor is an all-powerful PDF editor you can use for various PDF editing functions, including darkening it. Darkening a PDF using this powerful PDF editing tool is easy and can be done with just a few clicks. 

Moreover, this editor can be used to add, split, or merge PDF documents. New pages, including blank pages and specific pages from other PDFs, can be added easily. It also comes with features that can be used to interconvert PDF and other editable file formats such as Microsoft Word, Excel, Powerpoint, and several image formats, including JPEG, PNG, GIF, and TIFF. 

Other important functions include:

Follow these steps to darken a PDF using EaseUS PDF Editor:

Step 1. Open this program on your Windows PC. Click on "File" > "Open" and select the document you want to darken.

Import PDF file

Step 2. Once the document opens, click on Pages on the secondary toolbar, and choose the "Add" option in the sidebar.

Choose on Background option

Step 3. Now, in the From color field, select a dark color from the color palette. Finally, slide the bar next to Opacity to make it 100% and save the file. 

How to darken a PDF

Step 4. Once done, click "File" > "Save" to save your darkened PDF file locally.

Save darkened PDF file

How to Darken A Light PDF with Adobe on Windows and Mac

Adobe Acrobat Pro is another PDF editing tool you can use on Windows or Mac to darken a PDF. It can also be used to perform several other PDF editing functions such as convert it among PDF and several other editable formats such as MS Word, Excel, Powerpoint, and some image formats including JPG, PNG, etc. 

You can also edit a PDF document as you want using this tool. It can be used to easily create, add, split, or compress a PDF. It also comes with several security features with which you can encrypt, decrypt, watermark a PDF with ease. 

To use Adobe Acrobat to darken a PDF, follow these simple steps:

Step 1. Open the PDF you want to darken in Adobe Acrobat. Go to the top menu, click on Edit> Preferences.

Step 2. Go to the Categories section, select Touch Up followed by Choose Image Editor. Now, a prompt asking you to choose an image editor will open. If you have Photoshop installed, it will be selected automatically. 

Step 3. Now, click on Tools > Pages. Choose Add Background from the Background options. 

How to darken a pdf with adobe

Step 4. Once a prompt asking you to choose a background color appears, select a dark color and click OK. Next, click on Edit Text, select the part of the PDF you want to darken, and then click on Edit Object. 

Step 5. You have to edit the object with image editing tools like Photoshop, GIMP, or any other image editing tool. To get there, click on Tools > Content Editing > Edit Text and Images, and then right-click on the page and edit it with your image editor. 

Step 6. Save the file and close the image editor. The PDF should now be darkened. 

How to Darken PDF File Using Preview on Mac 

Preview is the default PDF and image viewer on macOS and comes with a range of PDF editing features. You can use this powerful PDF editing tool to darken a PDF and perform several other editing functions. 

You can find text, display PDFs as a slideshow, print or lock a PDF easily using Preview on Mac. You can also make changes to PDFs like annotate, combine, crop, rotate, add effects or password protect PDF files easily.

Darken a pdf with preview

To use Preview to darken a PDF on Mac, follow these steps:

Step 1. Open the PDF you want to darken with Preview.

Step 2. Go to "File" > "Export".

Step 3. Go to the Quartz Filter section select Lightness Decrease. 

Step 4. Save the file. When you reopen it, it should be darkened. 

The Bottom Line

Darkening a PDF is often needed for easy comprehension and clearer readability. For that, you can use any of the three tools mentioned above. On a Windows PC, you can use EaseUS PDF Editor for several editing tasks, including darkening a PDF document. 

If you are using a Mac, you can use its default built-in app Preview to darken the document. Or, you can use Adobe Acrobat Pro on both Windows and Mac to perform several PDF editing tasks, including darkening it.